"Gnome Shell 2.91.90 was released yesterday getting some fine adjustments according to the release announcement: 'This release just about concludes user interface changes anticipated before GNOME 3.0. The only significant change we expect after this release is to add a native network indicator based on NetworkManager 0.9.' Gnome Shell 2.91.90 brings new automatic workspaces, removed minimize and maximize buttons from window titlebars, a PolicyKit authentication agent and more."